Gas-burner structure for bakers&#39; ovens



June s,192e.. 1,587,851

E. H. POTTER ET AL GAS BURNER STRUCTURE FOR BAKERS OVENS Filed July 3. 1925 2 Sheets-Sheet 1 IIHHIHIh 77- June 8 1926. 1,587,851

E. H. POTTER ET AL GAS BURNER STRUCTURE FOR BAKERS OVENS Filed July 5. 1925 2 Sheets-Sheet 2 (Ink 7 W V L 4 Al BY W 4 ATTORNEYS.

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Patented June 8, 1926.

UNITED STATES PATENT OFFICE.

EDWIN H. POTTER, F BROOKLYN, NEW YORK, AND CHARLES S. SHARP, OF BOONTON, NEXV JERSEY, ASSIGNORS TO HUBBARD OVEN AND MFG. CO., INC, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

GAS-BURNER STRUCTURE FOR BAKERS OVENS.

Application filed July 3, 1925.

This invention relates, generally, to improvements in bakers ovens provided with gas burners as the source of heat.

Our invention has for its principal object to provide a novel construction and arrangementof combustion chamber beneath the oven bed shelf, in which are disposed gas burners of the pipe type, adapted to extend, preferably, from the front of the oven ap proximately throughout its entire depth, together with a novel construction and ar rangeinent of means for so supplying air to the burners to support combustion of the gas delivered therefrom, that uniform and complete combustion of such gas throughout the entire lengths of the burners is assured, and consequently a uniform and properly diffused heat is produced without waste or odor, and without the production of dirt, soot or similar undesirable effects of incomplete or irregular combustion.

Another object of this invention is to provide a novel means for insuring the initial ignition of the gas burners tl'iroughout their entire length whenever gas is delivered to and through the same.

Other objects of this invention, not at this time more particularly enumerated, will be clearly understood from the following detailed description of the same.

The invention is clearly illustrated in the accompanying drawings, in which Figure 1 is a partial front elevation of a bakers oven provided with gas burners and constructed in accordance with the principles of our invention; Figure 2 is a fragmentary vertical transverse section, taken on line 22 in Figure 1, but drawn on an enlarged scale; Figure 3 is a fragmentary detail vertical longitudinal section, taken on line q3-3 in Figure 2, but drawn on a further enlarged scale; Figure 4 is a fragmentary vertical transverse section, taken on line 4% in Figure 3; Figure 5 is a fragmentary bottom plan view of a burner baffle; and Figure 6 is a similar view showing a modified construction of said burner baffle.

Similar characters of reference are employed in all of the hereinabove described views, to indicate corresponding parts.

Referring now to said drawings, the reference character 1 indicates the complete bakers oven made according to and embodying Serial No. 41 ,245.

the principles of our present invention. In its general features of construction the oven consists of a main housing comprising outer enclosing walls 2, preferably of the double or hollow type, the interior spaces of which are packed with mineral wool 3, to provide heat insulation, or any other suitable or well known construction may be employed. The interior of the main housing is suitably subdivided by tile walls, such as the tile bedshelf at shown in Figure 2, to provide in the upper portion thereof the oven proper or baking chamber 5. The space within said main housing, which is beneath said bedsholf t, provides a combustion chamber 6. Said combustion chamber space is further subdivided by a horizontal partition or false-bottom 7, spaced above the true bottom 8 of the housing, so as to provide, coextensive with and beneath the combustion cham-' her 6, an air-box or intake chamber 9. The enclosing wall 2 is pierced with openings which provide air intake ports 10 leading into said air-box or intake chamber 9.

The reference character 11 indicates the gas burners of the oven, the. same being of the pipe type; that is, being formed from suitable lengths of pipe provided at their upper faces with burner perforations 12, which are spaced apart to provide a longitudinally disposed row from end to end of each burner. Said burners ll'are suitably supported above the partition or false bottom 7, so as to extend from front to rear across the bottom of the combustion chamber 6, the same being laterally spaced apart at desired intervals.

The reference character 13 indicates a main gas supply pipe which extends exteriorly across the lower front of the oven structure. Each gas burner 11 is connected in communication with said supply pipe 13 by suitable feed connections 14, which eX- tend through the outer wall 2 into coupled relation with each burner. Each feed connection 14: maybe provided with an airmixing fixture l5, and may be further provided with a shutoff valve 16, so that the supply of gas to the burners may be inclividually and selectively controlled. Said main gas supply pipe 13 is provided with a main gas-cock or shut-off valve 17 to generallycontrol the supply of gas to the burners.

The only connection thecolnbustion chamber has withatinospheri air isjthroiigh air delivery ports 18 which are provided in'the partition or false bottom 7 interinediatethc combustionchainher fi aincl'the air-boxior iiitake chamber 9,;t o extendlongitudinally be- ;eath, and preferably along each side of each burner 11. Secured to the upper side of said partition or false bottom 7, to extend respectively adjacent to eachside of each burner 11 and above the'aindelivery ports 18, are inclined deflector flanges 19 which are respectively iiielin eachot r so to tend'to'ceiiver e', bove'thehurners 1'1, biitivith their. free edges spaced laterally apart to pro ide'lan I p hcombustion space ofab'o" eith'e bhrn'erpertorations '12. V

Krran'ged to exteiidn transversely beneath aiid adjac'eiit to the an r 'ends otthe burners fll is -a V'pil ot or 1 iiti'on burner 2i provided ivithburner'openiiigs 22 adjacent toeac h burner 11, to- 'thereby furnish a pilot or. ig'iiition fl'an'ie adjaceiit to each biiriierll. Said pilot burner 'Ql i's interc'oiin'ectedivithsaid n ain' gas supply pipe '13 by a suitable teedcbiihection 23, including a sh'ut o li' valve 24. I

Supported ihlohg-itudinal extension above each pipe burner 11, "so as to be suitably spaced alcove an'dooincident to 'the row or" burner erforations 12 is 'a bathe-plate 25. lhe 'ine'aiis for adjust ably supporting each bathe-plate 25'coinprises a series'of spaced pairs'of standards 26, the iiieihhersof which are suitably affixed to the partition or false bottoiii 7 to respectively 'projectupwardly on op'l'josite'sides of the burner 11. The free ends of said standards are threaded'to receive supporting nuts 27. Thebatiie plate 25 is pro'i ided, at: spaced intervals corresponding to'the spacing of said pairs of standards 26, 'With transverse bridge pieces 28,'the'free ends'of \vlnc'lrare pertorated to pass'over said standards'so as to be mutually supported by said supporting nuts 27. Lock nuts are provided on each'standard above the engaged ends ot'said brid' 'e pieces 28 to secure the latter agaiiist removal from "said supporting nuts. It will be understood from the above description, and fro an inspection of he accom an in drawings, that the ele'va- 'tio'n ofthe baiileplates 25 above the burners 11 may be regulated or adjusted, hy'raising or lovveringfthe supporting, nuts 27 as may be desired, and that's I may therefore be positioned at proper d' bathe-plates heights aboi're the burner perforations 13 according to thelheig ht of the Ifia'rne issuing therefrom. The ui derside or said baffleplates 25 are providedfyyith transyerse suit ably s vaced fscoresor grooves 8001f a depth preferablyV approximating one h'alf of the thickness of "thefbafile-plates. ;,Th'ese scores may be directly transverse; that is at right angles to the'longitude of the bathe-plate, as

shown in Figure 5, or the same may be dl a oii iy tran verse, asshovv'n in Figure (3 The said scores or grooves 30 are close 'enou'g'h'to each other so that expansion of the portic'nsofsaid'ballle-plates immediately ex posed to burner flames takes place in each short.intermediate section, and is hot carriedthroughout the entire bathe plate. As will be evident-said b'alile plates are removablefor replacement or repai" as occasion "may require.

The operation of the novel construction of burner irangehientfabove described, with the "attendant advantages, is as tloln' ze H a I Either natural orf i aniifacturecl gas may he supplied to the burners ill and the latter nfa'yihe either of -u1e aim0sp11en@ type, as showmor of the pre ini'xed type,

Gas is deliver ed in required 'ol urne to the pilot'biirne ril by manipulating the control valve 24. sothahatter initi'al ignition of the same, a pilot tlalne is provided adjaccntto the ti'nwardend of e'ach'burner 11.

The gas inay be delivered through the "tin supply pipe '13 by opening the main control valve '17,andthedeli'very of gas to the respective burners ll inay be selectively controlled 'by nanipulating the individual shut-oh valves 16 With which each burner is provided.

l v h'en gas is thus delivered to'any one or more of the burners 11, the same will issue from the burner perforations 1 2, and will accumulate beneath the battle plate 25, Whereiiponthe adjacent pilot flame will ignite "the gas, so that an'ignitingii'amewill progress beneath the bathe plate throughout the entirelength of the burner '11, thus assuring complete ignition of thegas issuing froin'the burner perforations 12 from one end of the burner 11 to'the other.

Sincethe onlyconnnunication which the combustion chamber 6 possesses with the outside atmosphere is by Way oi the air-h 2-; 'o'r intake chamber 9 through the air ports IS in the partition or false bottom 7 (said airbon' or iiitake'recciving; the air through the intake ports 10), it follows that .air to provi'de oxygen to support the combustion of :gas at the burners 11 is evenly distributed through said air ports 18 beneath said burners'and throughout the entire length of the latter, Without regard to the temperature inside the conibustion chamber 6, in other lSl) flanges tend not only to cause an upward draft of air through the air ports 18, but also tend to deflect or direct the incoming air toward t-l'ie'points of combustion of the gas issuing from the burner openings 12, thereby assuring both a continuous flow of air from the air box 9 in sutlicient volume to assure complete combustion of the gas issuing from the burners at all points through out the length of the latter, as well as a proper delivery of such air to the zone of combustion above each burner. Another advantage of the described arrangement of deflector flanges 19 is that the same tend to retard the admission of air through the air ports 18 beneath burners Which are not in use, since the heated condition of the combustion chamber tends to repel air from entering the combustion chamberin the absence of the draft induced by combustion oi 'as above the burner.

l rom the above description of the construction and operation of our novel gas burner arrangement for bakers ovens, it will be understood that a maximum eiliciency is obtained from each burner through the provision of means whereby sulficient air is delivered in support of combustion throughout the entire length of each burner, thus assuring even and complete combustion of gas throughout the entire interior of the combustion chamber, and a consequent uniform application of the resultant heat to and around the baking chamberli.

We are aware that some changes may be made in the general arrangements and combinations of the various devices and parts oi our novel gas burner arrangement for bakers ovens, as well as in the details of the construction of the same, without departing from the scope of our present invention as described in the foregoing specification, and as defined in the appended claims. Hence, we do not limit our invention to the exact arrangements and combinations or the devices and parts set forth in the foregoing specification. nor do we confine ourselves to the exact details of the construction oi said parts as illustrated in the accannpanying drawings.

We claim 1. The combination with a bakers oven provided with a baking chamber and adjacent combustion chamber of a partition means subdividing said combustion chamber to form an underlying air box having air intake ports conn'mn'iicating directly with the outer atmosphere, a plurality of perforated pipc gas burners within said combustion chamber above said partition means, n'ieans for supplying gas to said burners, said partition means having air delivery ports leading from said air box coincident to and beneath each burner, and inwardly and upwardly inclined deflector plates above said air delivery ports and arranged to overhang the sides of each burner for the purposes described.

2. The combination with a bakers oven provided with a baking chamber and adjacent combustion chamber of a partition means subdividing said combustion chamber to form an underlying air box having air intake ports communicating directly with the outer atmosphere, a plurality of pertor-ated pipe gas burners within said com bustion chamber above said partition means, means for supplying gas to said burners, said partition means having air delivery ports leading from said air box coincident to and beneath each burner, inwardly and upwardly inclined deflector plates above said air delivery ports and arranged to overhang the sides of each burner, and a baiile plate spaced above and longitudinally coextensive with each burner.

3. The combination with a bakers oven provided with a baking chamber and adjacent combustion chamber of a partition means subdividing said combustion chamber to form an underlying air box having air intake ports communicating directly with the outer atmosphere, a plurality of perforated pipe gas burners within said combustion chamber above said partition means, means for supplying gas to said burners, said partition means having air delivery ports leading from said air box coincident to and beneath each burner, inwardly and upwardly inclined deflector plates above said air delivery ports and arranged to overhang the sides of each burner, a baffle plate spaced above and longitudinally coextensive with each burner, and means for adjustably and removably supporting said bathe-plates.

The combination with a bakers oven provided with a baking chamber and adjacent combustion chamber of a partition means subdividing said con'ibustion chamber to form an underlying air box having air intake ports communicating directly with the cute atmosphere, a plurality of perforated pipe gas burners within said combustion chamber above said partition means. means for supplying gas to said burners, said partition means having air delivery ports leading from said air box coincident to and beneath each burner, inwardly and upwardly inclined deflector plates above said oelivery ports and arranged to overhang the sid s oi each burner. a battle plate spaced above and longitudinally coextensive with each burner, and each battle-plate hav ing at its under or burner facing side expan sion coi'npensating means comprising a pluality of spaced apart transverse channels.

The combination with a bakers oven provided with a"'baking chamber and adjacent combustion chamber of a partition means subdividing i aid combustion chamber balile-pr to form an underlying air box having air iii-- take ports communicating directly with the enter atmosphere, a plurality of perforated pipe bnrners vithin said combustion chain said partition means, means to said burners, said parair delivery ports leadbox coincidentto and be abo vc :d to overhai'ig the braille-plate spaced above t rally coextensive with each be s fo adiustably and ren'iovably sale in plates. and each be i g at s undn or burner rec. h de es ipansion eon'ipensatnig means coinpi inc plurality of spaced 1 trai sverse channels.

i with a bakers oven i l with 1 ba -r=.mber

provile a iibution' iaihber ot a 1 cent 'coi par icion means subdividing ,Jitltl combustion chainb r be having a p and i to :t'orni an unde lyii a] c r irtalze ports coinninnicut-i directly with outer atmosphere, it p v o perfoied pipe gas bu lcombusabore c; e i'inei tion chamber lilS for delivering air id around each burner, a

to prcnde an ignition flan; 1

1 d air box provided with a baking chamber and adjacent combustion chamber of a partition odividiig nit c(inil*u"'on chamber i having air an nude lyn rts cininnn 'r'ctly with i oi? perfocrs i combussaic partition means, air from said air box *er, a pilot burner to a itucinally co vith Qi-Cl'l Burn r, and each battle-p aving at its under or burner eating means,

facing side expansion (301112811, comprising a plurality of spaced apart transverse clrunbers.

8. he con bination witl a bakers oven provided with a baking chamber and ad3acent comb istion chamber of a partition means subdividing said combustion chamber to form anunderlying air box having air intake ports communicating directly, with the outer atmosphere, a plurality of perforated pi )e gas burners within said combustion chamber above said partition means, said partition means having air delivery ports leading from said air be coincident to an beneath each burner, inwardly and u p w irc l y in dclive inclined deflector-plates above said i'y ports and trranged to overhang sides of each burner, a pilot burner to an ignition flame adjacent to each pe bur'ier, means for supplying gas to said pilotburner,

. ,e burners and to le-plate spaced above and longiing 1 in said air box coincident to 1 burner, inwardly and upiied deflector plates above said )orts and arranged to overhang wardl i an. iithi el'jy ch burner, a pilot burner to )1 il U iition flame adjacent to each pipe burner, meal s for supplying gas to said pi-Je burners and to said pilot burner, a battle-p atespaced above and longitudinally coextensive with each burner, and means for adjustably and removably supporting said ballie-plates 10. The combination with a bakers oven proviced with a baking chamber and adjacent combustion chaivnber of a partition means subdividing said combustion chamber to form an underlying'air box having air intake ports connnunicating directly with the outer atmosphere, a plurality ofpcriterated pipe gas burners within said combustion chamber above said partition means, said partition means having air delivery ports leading from said air box coincident to and beneath each burner, inwardly and up\ *ardly inclined deflector plates above said air delivery ports and arranged to overhang the sides of each burner, a pilot burner to provide an ignition ihnne adjacent to each pipe burner, means for supplying gas to said pipe burners and to said pilot burner, a baiileplate-spaced above and longitudinally coextensive with each burner, neans for adjustably and 'rcmovably supporting said ba lie-plates, and eachbattle plate having at its under or burner facing side expansion con'ipensatii g means comprising a plurality out spaced apart transverse channels.

11. The combination with a bakers oven provided with a baking chamber and adjacent combustion chamber of a partition means subdividing said combustion chamber to form an underlying air box having air intake ports communicating directly with the outer atmosphere, a plurality of pertorated pipe gas burners within said combustion chamber above said partition means, said partition means having air delivery ports leading tr in. said air box coincident to and beneath each burner, inwardly and upwardly inclined deflector plates above said air delivery ports and arranged to overhang the sides oi each burner, a pilot burner to provide an ignition flame adjacent to each pipe burner, means for supplying gas to said pipe burners and to said pilot burner, a baffle-plate spaced above and longitudinally coextensive with each burner, and each battle-plate having at its under or burner facing side expansion compensating means comprising a plurality of spaced apart trans verse channels.

12. A gas burner structure for ovens or the like having a combustion chamber, conr prising an air box beneath the bottom of said combustion chamber, a perforate pipe gas burner extending across the bottom of said combustion chamber, said combustion chamber bottom having air delivery means leading from said air box coincident to and beneath said gas burner, and inwardly and upwardly inclined deflector plates above said air delivery means arranged to overhang the sides of said gas burner.

13. A gas burner structure for ovens or the like having a combustion chamber, comprising an an box beneath the bottom of said combustion chamber, a perforate plpe gas burner extending across the bottom 01- said combustion chamber, said combustion chamber bottom having air delivery means leading from said air box coincident to and beneath said gas burner, inwardly and upwardly inclined deflector plates above said air delivery means arranged to overhang the sides of said gas burner and a battle plate spaced above and longitudinally coextensive with said gas burner.

14. The combination with a perforate pipe gas burner ot a baiiie plate spaced above and longitudinally coextensive with said burner, mezms for adjustably and removably supporting said battle plate, and said baffle plate having at its under or burner facing side expansion compensating means comprising a plurality o1 spaced apart transverse channels.

15. The combination with a perforate pipe gas burner of a battle plate spaced above and longitudinally coextensive with said burner, said baffle plate having at its under or bu ner facing side expansion compensating means comprising a plurality of spaced apart transverse channels. t

In testimony that we claim the invention set forth above we have hereunto set our hands this 8th day of June, 1925.

EDlVIN H. POTTER. CHARLES S. SHARP. 

